Hello, I've got the following WARNING while running syzkaller fuzzer:
------------[ cut here ]------------ WARNING: CPU: 0 PID: 9197 at kernel/sched/core.c:6149 __might_sleep+0x149/0x1a0 kernel/sched/core.c:6144 do not call blocking ops when !TASK_RUNNING; state=1 set at [<ffffffff813fa422>] prepare_to_wait+0x182/0x530 kernel/sched/wait.c:178 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 9197 Comm: syz-executor2 Not tainted 4.10.0+ #54 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:15 [inline] dump_stack+0x292/0x398 lib/dump_stack.c:51 panic+0x1cb/0x3a9 kernel/panic.c:179 __warn+0x1c4/0x1e0 kernel/panic.c:540 warn_slowpath_fmt+0xc5/0x110 kernel/panic.c:563 __might_sleep+0x149/0x1a0 kernel/sched/core.c:6144 slab_pre_alloc_hook mm/slab.h:432 [inline] slab_alloc_node mm/slub.c:2644 [inline] kmem_cache_alloc_node+0x14a/0x280 mm/slub.c:2754 __alloc_skb+0x10f/0x770 net/core/skbuff.c:219 alloc_skb include/linux/skbuff.h:932 [inline] alloc_tx net/atm/common.c:75 [inline] vcc_sendmsg+0x5e8/0x1010 net/atm/common.c:609 sock_sendmsg_nosec net/socket.c:633 [inline] sock_sendmsg+0xca/0x110 net/socket.c:643 ___sys_sendmsg+0x9d2/0xae0 net/socket.c:1985 __sys_sendmsg+0x138/0x320 net/socket.c:2019 SYSC_sendmsg net/socket.c:2030 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2026 entry_SYSCALL_64_fastpath+0x1f/0xc2 RIP: 0033:0x4458b9 RSP: 002b:00007f20dd37ab58 EFLAGS: 00000286 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000004458b9 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000005 RBP: 00000000006e1af0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000708000 R13: 0000000000000005 R14: 0000000020000ff8 R15: 0000000000000008 On commit 86292b33d4b79ee03e2f43ea0381ef85f077c760
